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Clustering of DESI galaxies split by thermal Sunyaev-Zeldovich effect

Journal Article · · The Open Journal of Astrophysics
DOI:https://doi.org/10.33232/001c.146033· OSTI ID:3010596
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  1. Center for Astrophysics Harvard & Smithsonian; The Ohio State University; The Ohio State University; The Ohio State University
  2. Center for Astrophysics Harvard & Smithsonian
  3. Lawrence Berkeley National Laboratory
  4. Boston University
  5. Università degli Studi di Milano; INAF-Osservatorio Astronomico di Brera
  6. University College London
  7. Institut d’Estudis Espacials de Catalunya (IEEC); Institute of Space Sciences, ICE-CSIC
  8. The University of Utah
  9. Universidad Nacional Autónoma de México
  10. NSF NOIRLab
  11. Lawrence Berkeley National Laboratory; University of California, Berkeley
  12. Barcelona Institute for Science and Technology
  13. Universidad de los Andes; Universidad de los Andes
  14. Institut d’Estudis Espacials de Catalunya (IEEC); Institute of Space Sciences, ICE-CSIC; University of Portsmouth
  15. Fermi National Accelerator Laboratory
  16. Institut d'Astrophysique de Paris; IRFU, CEA, Université Paris-Saclay
  17. The Ohio State University; The Ohio State University
  18. The University of Queensland
  19. The University of Texas at Dallas
  20. Southern Methodist University
  21. Universitat Autònoma de Barcelona; The Barcelona Institute of Science and Technology
  22. The Barcelona Institute of Science and Technology; Institució Catalana de Recerca i Estudis Avançats
  23. University of Sussex
  24. University of Portsmouth
  25. Lawrence Berkeley National Laboratory; IRFU, CEA, Université Paris-Saclay
  26. University of Waterloo; Perimeter Institute for Theoretical Physics; University of Waterloo
  27. Instituto de Astrofísica de Andalucía (CSIC)
  28. Universitat Politècnica de Catalunya
  29. Sejong University
  30. CIEMAT
  31. University of Michigan
  32. National Astronomical Observatories, Chinese Academy of Science
+ Show Author Affiliations
The thermal Sunyaev-Zeldovich (tSZ) effect is associated with galaxy clusters - extremely large and dense structures tracing the dark matter with a higher bias than isolated galaxies. We propose to use the tSZ data to separate galaxies from redshift surveys into distinct subpopulations corresponding to different densities and biases independently of the redshift survey systematics. Leveraging the information from different environments, as in density-split and density-marked clustering, is known to tighten the constraints on cosmological parameters, like $$\Omega_m$$, $$\sigma_8$$ and neutrino mass. We use data from the Dark Energy Spectroscopic Instrument (DESI) and the Atacama Cosmology Telescope (ACT) in their region of overlap to demonstrate informative tSZ splitting of Luminous Red Galaxies (LRGs). We discover a significant increase in the large-scale clustering of DESI LRGs corresponding to detections starting from 1-2 sigma in the ACT DR6 + Planck tSZ Compton-$$y$$ map, below the cluster candidate threshold (4 sigma). We also find that such galaxies have higher line-of-sight coordinate (and velocity) dispersions and a higher number of close neighbors than both the full sample and near-zero tSZ regions. We produce simple simulations of tSZ maps that are intrinsically consistent with galaxy catalogs and do not include systematic effects, and find a similar pattern of large-scale clustering enhancement with tSZ effect significance. Moreover, we observe that this relative bias pattern remains largely unchanged with variations in the galaxy-halo connection model in our simulations. This is promising for future cosmological inference from tSZ-split clustering with semi-analytical models. Thus, we demonstrate that valuable cosmological information is present in the lower signal-to-noise regions of the thermal Sunyaev-Zeldovich map, extending far beyond the individual cluster candidates.
Research Organization:
Andes U., Bogota; Barcelona, Autonoma U.; Barcelona, IFAE; Barcelona, Polytechnic U.; Beijing Observ.; Boston U.; Brera Observ.; Chicago U., KICP; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Granada U., Theor. Phys. Astrophys.; Harvard-Smithsonian Ctr. Astrophys.; Hiroshima Shudo U.; ICE, Bellaterra; ICREA, Barcelona; IRFU, Saclay; KEK, Tsukuba; Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Madrid, CIEMAT; Michigan U.; Milan U.; Natl. Solar Observ., Tucson; Ohio State U.; Ohio State U., Dept. Astron.; Paris, Inst. Astrophys.; Perimeter Inst. Theor. Phys.; Portsmouth U., ICG; Queensland U.; Sejong U.; Southern Methodist U.; Sussex U.; U. Texas, Dallas; UC, Berkeley, Math. Dept.; UNAM, Mexico; Univ. of Texas at Dallas, Richardson, TX (United States); Univ. of Utah, Salt Lake City, UT (United States); University Coll. London; Utah U.; Waterloo U.
Sponsoring Organization:
US Department of Energy; USDOE Office of Science (SC), High Energy Physics (HEP); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Grant/Contract Number:
89243024CSC000002; AC02-05CH11231; SC0009959; SC0013718; SC0022184
OSTI ID:
3010596
Alternate ID(s):
OSTI ID: 3006319
OSTI ID: 3009978
OSTI ID: 3005797
Report Number(s):
FERMILAB-PUB-25-0635-PPD
Journal Information:
The Open Journal of Astrophysics, Journal Name: The Open Journal of Astrophysics Vol. 8; ISSN 2565-6120
Publisher:
Maynooth Academic PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

Astronomy data analysis
Cosmic microwave background radiation
Cosmology
Galaxy clusters
Galaxy dark matter halos
Large-scale structure of the universe
Redshift surveys
Sunyaev-Zeldovich effect